A study on the reliability analysis during preliminary design : a rocket motor example

Download

index.pdf

Date

2006

Author

Bozkaya, Kenan

Metadata

Show full item record

Item Usage Stats

252
views

272
downloads

To be competitive in the market, it is very important to design cost effective and reliable products. For this purpose, it is necessary to consider reliability as an integral part of the design procedure. Therefore, reliability which is a design parameter that affects cost and safety of a system should be taken into consideration in early phases since it is very difficult to change design at the later phases. Reliability of a rocket motor can be evaluated by reliability testing but these tests are very expensive and difficult since the tests are destructive and test sample size is determined by the binomial law. Because of the difficulties in reliability testing, in early design phases reliability can be evaluated by using reliability prediction results. This thesis report includes application of probabilistic approach for a solid rocket motor design to evaluate its reliability in preliminary design phase. In this study, it is aimed to assess the solid rocket motor ballistic performance reliability and casing structural reliability, determine important parameters affective on the solid rocket motor reliability and find a new design point to improve the reliability. Variations in dimensions and material properties are considered as the sources of failures and the limit states for acceleration, total impulse and maximum stress in the casing are approximated with response surface method by considering these variations. With the response surface functions, Monte Carlo simulation is used to assess failure probability and distributions of the rocket motor performance. Besides the assessment of the reliability, capability of the response surface functions to estimate the rocket motor performance and effects of the input parameters on the rocket motor performance and performance variation are also examined. By considering the effect of the input parameters, a new design point is proposed to decrease the total probability of failure.

Subject Keywords

Mechanical Engineering.

URI

http://etd.lib.metu.edu.tr/upload/2/12607500/index.pdf
https://hdl.handle.net/11511/16375

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Development of a bidding algorithm used in an agent-based shop-floor control system Uluer, Muhtar Ural; Kılıç, Sadık Engin; Department of Mechanical Engineering (2007) In this study a time based bidding framework is developed which is used for dispatching jobs to manufacturing resources in a virtual shop-floor environment. Agent-based shop-floor control approach is implemented with machine and part agents. The Contract-net communication protocol is utilized as the negotiation scheme between these agents. Single step product reservation (SSPR) technique is adopted throughout the study. Primary objective is determined as meeting the due dates and if the lateness is inevitab...
Development of a web-based dynamic scheduling methodology for a flexible manufacturing cell using agent based distributed internert applications Alataş, Boran; Anlağan, Ömer; Department of Mechanical Engineering (2004) The increasing importance of computer leads to develop new manufacturing methods. One of the most important example; 3unmanned shop floor4 model aims, the mankind can work in jobs that they can be more efficient and more comfortable. As the base of this model, in Middle East Technical University Computer Integrated Manufacturing Laboratory (METUCIM) 3Agent Version 1.14 system is developed. Windows Distributed Internet Applications (DNA) modeling technique is used for the software development. In the develop...
Design scaling of aeroballistic range models Kutluay, Ümit; Balkan, Raif Tuna; Department of Mechanical Engineering (2004) The aim of this thesis is to develop a methodology for obtaining an optimum configuration for the aeroballistic range models. In the design of aeroballistic range models, there are mainly three similarity requirements to be matched between the model and the actual munition: external geometry, location of the centre of gravity and the ratio of axial mass moment of inertia to the transverse mass moment of inertia. Furthermore, it is required to have a model with least possible weight, so that the required tes...
Reliability Analysis of Tactical Unmanned Aerial Vehicle (UAV) Sürücü, Barış; Alemdaroğlu, Hüseyin Nafiz (2017-09-20) To be competitive in the market, it is very important to design cost effective and reliable products. For this purpose, it is necessary to consider reliability as an integral part of the design procedure. Therefore, reliability which is a design parameter that affects cost and safety of a system should be taken into consideration in early phases since it is very difficult to change design at the later phases. Due to these causes the importance of reliability in manufacturing fields, especially in aviat...
Mechanical characterization and modelling of porous polymeric materials manufactured by selective laser sintering Tekin, Cevdet Murat; Dağ, Serkan; Department of Mechanical Engineering (2009) Rapid prototyping methods embrace a family of manufacturing methods that are developed to speed up the prototyping stage of product design. The sole needed input for production being the solid model of the part, mold/tool-free production characteristics and the geometric part complexity that can be achieved due to layer-by-layer production have extended the applicability/research areas of these methods beyond prototyping. Local pore formation in part that occurs as a result of the discrete manufacturing nat...

Citation Formats

K. Bozkaya, “ A study on the reliability analysis during preliminary design : a rocket motor example,” M.S. - Master of Science, Middle East Technical University, 2006.